I made one of these for myself a long time ago from billet. Lots of people have asked me if I would make more of them but I never did since they were so expensive to make. The other day I hit on a way to do the same thing that costs a lot less to mfg so I cranked out a small production run.

The plate bolts to the deck surface and it holds a dial indicator in line with either the intake or exhaust lifter. This plate only fits big block engines. You have to supply your own dial indicator.